Read Chapter 4: Crater's Edge

The rover’s cabin rattled like a tin can full of gravel. Elena’s teeth slammed together on a curse and she braced both gloved hands against the dash, watching the heads-up display flicker between the route map and the external camera feed. What had been a clear, empty stretch of regolith a minute earlier now glittered like a swarm of angry fireflies arcing down out of the black.

“Meteor shower,” Jack said, not a question. His hands were a blur across the controls, angling the rover toward a ridge line she’d marked as structurally unstable.

“Don’t,” she said, pointing. “There’s a fissure system east of that ridge. We’d have to climb out of the cockpit to reach it.”

“Out of the cockpit.” He laughed once, sharp and dry. “We’re already in suits, Vasquez. We’re just dragging a big metal coffin with us.”

Another ping rang off the hull with a sound like a hammer hitting sheet metal—closer than the last one. The rover shuddered.

“Lava tube,” she said, sudden and certain. “The one I flagged on the earlier survey, off the southern leg. Entrance should be a kink in the ground about four hundred meters from here.”

“You sure?”

“I mapped this whole sector myself, Mercer. While you were doing loop-de-loops in the test shuttle.”

He didn’t argue. He banked the rover hard to the right, the tires chewing up regolith and kicking up a plume of grey dust behind them. The external feed showed a grainy, silver-streaked sky, and Elena could count a dozen more incoming lines of fire. One struck the ground to their left and threw up a miniature plume of vaporized stone.

She grabbed the map readout and brought up the tube’s entrance. A collapsed yawning mouth of dark basalt, hidden behind a low rise. “There. Bring us in slow—the floor’s uneven.”

Jack did what she said without a single sarcastic remark, which was somehow more unsettling. He killed the headlights as they crossed the threshold, and for a moment the world went black and cavernous, old stone swallowing the frantic rhythm of the storm outside. Then he killed the engine and let the rover drift forward on momentum until it bumped gently against a wall of rough-cooled rock.

Silence. Punctuated only by the hum of the rover’s power cell and the sound of her own breathing inside her helmet.

“We wait it out,” Jack said, unclipping his restraints. “Shower’s small. Maybe fifteen, twenty minutes.”

Elena nodded and watched the external feed glitch to static. She powered it down to conserve juice and slumped in her seat. The suit fabric scraped against the seat harness with every breath, which meant every breath sounded like sandpaper in the silence.

“So.” Jack’s voice dropped into the space between them. “You applied for the transfer back to Earth.”

Her head snapped toward him. His face was half shadowed behind his visor, but his expression was unreadable. Not smug. Not gloating. Just… flat.

“How did you know that?”

“Reyes has a habit of leaving personnel files on shared drives. You weren’t exactly subtle about printing them.”

The heat that flooded her cheeks had nothing to do with the suit’s circulation. “You went through my files?”

“I went through my mission briefing,” he corrected, and there was an edge to his voice now, a tiredness that made the words feel heavier than they were. “Transfers out of the Luna Program require commander-level approval. And the file had his initials on it. I figured I deserved to know who I was partnering with.”

“That’s classified.”

“So is whatever’s in that locker you pried open before we left the base.”

She closed her mouth. The silence stretched between them, long and taut, until a fresh hail of micrometeorites drummed against the rock above them—muffled, distant, safe for now.

“It doesn't matter,” she said finally, quieter than she meant to. “The transfer’s moot. Dead woman walking, and all that.”

“Elena.” He said her name without her rank, without her title. Just her name, stripped bare. “Why Earth?”

“Why not?” She heard the defensive edge creeping into her own voice. “I’ve done my time. Mars, two tours. Moonbase, one. I know what this rock has to teach anyone, and it’s got nothing left for me.”

“That’s not an answer.”

“It’s the only one I have.”

He turned away, sudden and sharp, and reached for the heating unit mounted between their seats. It was a portable thermal coil, barely bigger than a lunchbox, meant to keep one person alive in a surface shelter for a few extra hours. Not two.

“We’ll have to share it,” he said, pulling it free from its mount. “My side’s colder than yours. Shadow-facing hull.”

Elena snorted. “So I should just take your word for that?”

“Vasquez, look at the suit telemetry. My external temp’s dropping twelve degrees faster than yours.”

She glanced at the readout on her forearm. He was right. She hated that he was right.

“Fine,” she said, and she shifted across the cabin, squeezing herself into the narrow space between her seat and his. The heater hummed low between them, a weak and painful warmth against the creeping cold of the moon.

They sat close enough that their shoulders almost brushed. Elena kept her gaze fixed on the distant, glimmering view of Earth through the tube’s entrance—small and blue and impossibly far away.

“Why did you leave Mars?” Jack asked.

The question hit her like a physical blow to the sternum. Her hand tightened around the heater’s casing.

“Why do you care?”

“Because we’re stuck out here together, and if we’re going to make it to Relay 7, I need to know who I’m trusting with my life.” His voice softened, just slightly. “And because you flinched when I asked. That’s not a normal flinch.”

Elena closed her eyes. Behind her lids, the memory flickered—red dust, a failing drill rig, the sound of Marcus’s voice over the comm, telling her to clear the blast zone. Telling her it wasn’t her fault.

But it was. It had been. She’d misread the strata, pushed the timeline, ignored the stress fractures in the data. One judgment call, one brutal, arrogant call, and seventy million dollars of equipment had gone up in dust. Marcus had survived—barely. She hadn’t been so lucky with her career.

“There was an accident,” she said, her voice barely more than a whisper. “On the dig site. I was wrong about the rock stability. Cost the program a lot of money. Cost me… my posting.”

Jack was silent for a long moment. Then, carefully, he said, “That’s not why you’re going back.”

“No,” she admitted, looking down at her hands. “It’s because Marcus is there. And I owe him a debt I can’t pay from orbit.”

She waited for the mockery. The clever, cutting reply she’d come to expect from the man who argued with her about every route, every sample, every damn rock she picked up.

Instead, Jack let out a slow breath. “I got blacklisted from a shuttle command two years ago,” he said. “For insubordination. Refused to launch during a Category 3 solar storm because a sensor pair was reading wrong. Command said I was being paranoid. My copilot said I was being a coward.”

Elena turned to look at him. His visor had steamed slightly on the inside, and he wiped at it with the back of his glove, looking younger than she’d ever seen him. Vulnerable.

“They were wrong,” he said. “The storm flipped. If we’d launched, we would have fried. But nobody ever admitted that out loud.”

“So they sent you to the moon,” she said.

“They sent me to the moon.” He shrugged, the motion awkward in the suit. “Figured I’d be less trouble out here, where there’s nobody to order around.”

Elena was about to reply when a new ping echoed through the hull. Not the patter of micrometeorites—something harder, more clinical. The rover’s console lit up, and a symbol flashed across the display.

A low-priority transmission. Military-band encrypted.

“That’s not coming from the base,” she said, frowning. “Base AI’s looped, and Relay 7’s dormant.”

Jack was staring at the code with a look she didn’t understand—half-recognition, half-dread.

“It’s not coming from the surface, either,” he said. “That transmission signature is from orbit. There’s a ship up there, Elena. And it’s been there this whole time.”